1 files changed, 44 insertions, 0 deletions
diff --git a/debug/backtrace-tst.c b/debug/backtrace-tst.c
new file mode 100644
index 0000000000..d899fb009f
--- /dev/null
+++ b/debug/backtrace-tst.c
@@ -0,0 +1,44 @@
+#include <execinfo.h>
+#include <inttypes.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+
+static int
+compare (const void *p1, const void *p2)
+{
+  void *ba[20];
+  int n = backtrace (ba, sizeof (ba) / sizeof (ba[0]));
+  if (n != 0)
+    {
+      char **names = backtrace_symbols (ba, n);
+      if (names != NULL)
+	{
+	  int i;
+	  printf ("called from %s\n", names[0]);
+	  for (i = 1; i < n; ++i)
+	    printf ("            %s\n", names[i]);
+	  free (names);
+	}
+    }
+
+  return *(uint32_t *) p1 - *(uint32_t *) p2;
+}
+
+
+int
+main (int argc, char *argv[])
+{
+  uint32_t arr[20];
+  size_t cnt;
+
+  for (cnt = 0; cnt < sizeof (arr) / sizeof (arr[0]); ++cnt)
+    arr[cnt] = random ();
+
+  qsort (arr, sizeof (arr) / sizeof (arr[0]), sizeof (arr[0]), compare);
+
+  for (cnt = 0; cnt < sizeof (arr) / sizeof (arr[0]); ++cnt)
+    printf ("%" PRIx32 "\n", arr[cnt]);
+
+  return 0;
+}